CN112192001B - 一种船用5Ni钢埋弧焊接方法 - Google Patents
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- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Abstract
本发明涉及一种船用5Ni钢埋弧焊接方法,(1)以抗拉强度为630~670MPa的船用5Ni钢作为拼接母材;匹配的焊接材料:焊接材料抗拉强度630~710MPa,焊丝直径为φ2.4mm以上,牌号为INCO‑WELD Filler Metal C‑276,焊剂为INCOFLUX 9;(2)拼接材料的埋弧焊接坡口采用K型坡口;(3)焊接参数:焊接电流410±10A、焊接电压为32±1V、焊接速度为27±2cm/min、焊接线能量30±3KJ/cm,连续对相同板厚的拼接母材的对接接头施焊,直至焊缝填满为止,并在每道次焊接后采用钢丝刷清理焊道;焊剂烘烤制度为350℃×1h;层间温度控制在≤80℃。埋弧焊对焊接接头抗拉强度、焊接接头焊缝、熔合线、热影响区等冲击吸收能量值均达到较高水平,焊接接头具有优良的低温冲击韧性及冷弯性能。
Description
技术领域
本发明涉及高Ni钢的焊接方法,尤其涉及船用5Ni钢的焊接方法。
背景技术
随着石油化学工业的发展,液化石油气船、以及经石油裂化、液化得到的液化乙烯船、丙烷船通常采用强度高、低温韧性好、延伸率高、剩磁低的5Ni钢建造。通常5Ni钢Ni含量介于4.7~5.3%之间,由于5Ni钢的Ni含量高,不仅给钢材生产制造带来一系列难题,也给后续厂家焊接、成型带来使用问题。国内已有少数几家钢企开发成功满足船级社规范要求的船用5Ni钢,也在慢慢开始投放市场。但是在焊接方面,特别是埋弧焊接方面仍存在低温韧性、以及焊接后冷弯性能不稳定,难以满足船级社可焊性试验要求。
经检索,中国专利CN10852661A公开了一种镍基实心焊丝气体保护焊接方法实现了5Ni钢、9Ni钢气体保护焊,但是文献中仅对9Ni钢焊接进行了具实施例说明,至于5Ni钢用该方法焊接效果如何,没有具体说明。解决5Ni钢可焊性差的难题,是船业的发展中重要的一环。
发明内容
本发明选择合适的5Ni钢板,配套焊材以及相应的埋弧对接焊工艺匹配,并进行系列的可焊性力学性能测试,结果表明,本发明船用5Ni钢埋弧焊接完全满足船级社可焊性试验要求。
具体地,本发明目的在于提供一种船用5Ni钢的埋弧焊接工艺,该工艺焊接前不预热、焊后无需热处理,具体如下
(1)以抗拉强度为630~670MPa的船用5Ni钢作为拼接母材;匹配的焊接材料:焊接材料抗拉强度630~710MPa,焊丝直径为φ2.4mm以上,牌号为INCO-WELD Filler Metal C-276,焊剂为INCOFLUX 9;
(2)拼接材料的埋弧焊接坡口采用K型坡口,坡口角度为45°,钝边为5mm;
(3)焊接参数:焊接电流410±10A、焊接电压为32±1V、焊接速度为27±2cm/min、焊接线能量30±3KJ/cm,连续对相同板厚的拼接母材的对接接头施焊,直至焊缝填满为止,并在每道次焊接后采用钢丝刷清理焊道;焊剂烘烤制度为350℃×1h;层间温度控制在≤80℃。
优选地,本申请焊接方法适用于40mm~50mm厚的所述拼接材料。
本申请关键在于,焊接所采用的焊丝化学组分及质量百分比为,C:≤0.03%,Si:0.10~0.40%,Mn:0.2~1.0%,P:≤0.020%,S:≤0.030%,Cr:14~18%,Ni:53~60%,W:3.0~4.5%,Fe:4.0~7.0%,Mo:15.0~17.0%,余量为不可避免的杂质元素。
通过上述船用5Ni钢埋弧焊接方法获得的两拼接母材的焊接接头经试验焊缝超声波探伤结果达到GB/T 11345-1989标准规定的要求I级要求。
通过上述船用5Ni钢埋弧焊接方法获得的两拼接母材的焊接接头的抗拉强度介于620~660MPa,弯心直径D=4a,180℃正反冷弯合格,-130℃极低温横向冲击韧性值稳定,其中焊缝处≥70J,熔合线≥60J,HAZ≥100J,母材≥180J,满足船级社可焊性认证及生产要求,即显著高于船级社规范要求的-110℃的极低温横向冲击韧性值≥27J。
通过上述船用5Ni钢埋弧焊接方法获得的两拼接母材的焊接接头的焊缝区组织为奥氏体组织,热影响区组织为下贝氏体组织,其中,下贝氏体组织片层细小,由此具备良好的极低温韧性。
与现有技术相比,本发明的优点在于:
(1)满足了液化石油气船、液化乙烯船等船用5Ni钢关键埋弧焊接工艺制造技术。埋弧焊对焊接接头抗拉强度、焊接接头焊缝、熔合线、热影响区等冲击吸收能量值均达到较高水平,焊接接头具有优良的低温冲击韧性及冷弯性能。
(2)本发明焊接接头热影响区HAZ组织主要为下贝氏体组织,贝氏体片层细小,焊接金属主要为奥氏体组织,从而使焊缝具有优良的强度及极低温韧性性能及冷弯性能。
(3)实现了船用5Ni钢对接接头厚板结构制造过程中焊前不预热、焊后不进行热处理的焊接工艺,采用多层多道连续施焊工艺时焊接接头具有优良的综合力学性能;焊接操作简便、高效、节能,适用于液化石油气船、液化乙烯船、液化丙烷船等船用5Ni钢制造及推广应用。
附图说明
图1为拼接母材组合50mm+50mm埋弧焊焊接道次示意图。
图2是本发明实施例1焊接接头的焊缝组织,为奥氏体组织。
图3是本发明实施例1焊接接头熔合线组织,一侧为奥氏体组织,另一侧为下贝氏体组织,贝氏体片层细小。
图4是本发明实施例1焊接接头距熔合线3mm的HAZ区组织,为下贝氏体组织,片层细小,初始奥氏体相比于图3中的初始奥氏体组织更加细小。
具体实施方式
以下结合附图实施例对本发明作进一步详细描述,所述实施例是示例性的,旨在用于解释本发明,而不能理解为对本发明的限制。
实施例1:
母材:抗拉强度为653MPa的船用5Ni钢,-130℃极低温横向冲击韧性值≥180J,厚板组合50mm+50mm。对接焊每块试板尺寸为1300mm×300mm×50mm,埋弧焊坡口采用K型坡口,坡口角度为45°,钝边为5mm;
焊接材料匹配:
焊丝:其化学组分及质量百分比为:C:0.02%,Si:0.15%,Mn:0.4%,P:0.015%,S:0.01%,Cr:16.4%,Ni:57%,W:3.5%,Fe:5.50%,Mo:16.0%,余量为不可避免的杂质元素。
焊丝直径为并与烧结焊剂INCOFLUX 9匹配进行焊接,熔敷金属的力学性能为:屈服强度Rp0.2:407MPa,抗拉强度Rm:665MPa,延伸率A:42.0%,Z向断面收缩率:38%,-110℃AKv冲击吸收能量值:92J、89J、77J。
焊接工艺参数为:焊接电流410±10A、焊接电压32±1V、焊接速度为27±2cm/min、焊接线能量30KJ/cm;焊剂烘烤制度为350℃×1h;层间温度控制在50-70℃。焊接道次参见图1。
实施例2:
母材:抗拉强度为639MPa的船用5Ni钢,厚板组合40mm+40mm。对接焊每块试板尺寸为1300mm×300mm×40mm,埋弧焊坡口采用K型坡口,坡口角度为45°,钝边为5mm;
焊接材料匹配:
焊丝:其化学组分及质量百分比为:C:0.02%,Si:0.20%,Mn:0.45%,P:0.013%,S:0.01%,Cr:16.8%,Ni:58%,W:3.3%,Fe:5.80%,Mo:16.5%,余量为不可避免的杂质元素。
焊丝直径为并与烧结焊剂INCOFLUX 9匹配进行焊接,熔敷金属的力学性能为:屈服强度Rp0.2:513MPa,抗拉强度Rm:660MPa,延伸率A:32.0%,Z向断面收缩率:51%,-110℃AKv冲击吸收能量值:93J、109J、84J。
焊接工艺参数为:焊接电流410±10A、焊接电压32±1V、焊接速度为27±2cm/min、焊接线能量30KJ/cm;焊剂烘烤制度为350℃×1h;层间温度控制在50-70℃。
采用上述焊接方法焊接的船用5Ni钢板焊接接头经试验焊缝超声波探伤结果达到GB/T 11345-1989标准规定的要求I级要求。
采用上述焊接方法焊接的船用5Ni钢,经对焊接接头力学性能检测,拉伸试验、冲击试验及冷弯试验结果分别见表1、表2、表3。从实施例性能来看,钢板焊接接头的抗拉强度介于620~660MPa,弯心直径D=4a,180℃正反冷弯合格,焊缝、熔合线、HAZ区-130℃极低温横向冲击韧性值稳定,完全满足船级社可焊性认证及生产要求。
表1对接接头拉伸试验结果
表2对接接头弯曲试验结果
表3焊接接头冲击试验结果
注:“/”后数值为该组平均值。
表明焊接热影响区具有极低的低温韧性。
尽管以上详细地描述了本发明的优选实施例,但是应该清楚地理解,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (7)
1.一种船用5Ni钢埋弧焊接方法,其特征在于:
(1)以抗拉强度为630~670MPa的船用5Ni钢作为拼接母材,拼接母材的-130℃横向冲击韧性值≥180J;匹配的焊接材料:焊接材料抗拉强度630~710MPa,焊丝直径为φ2.4mm以上,牌号为INCO-WELD Filler Metal C-276,焊剂为INCOFLUX 9;
(2)拼接材料的埋弧焊接坡口采用K型坡口;
(3)焊接参数:焊接电流410±10A、焊接电压为32±1V、焊接速度为27±2cm/min、焊接线能量30±3KJ/cm,连续对相同板厚的拼接母材的对接接头施焊,直至焊缝填满为止,并在每道次焊接后采用钢丝刷清理焊道;焊剂烘烤制度为350℃×1h;层间温度控制在≤80℃。
2.根据权利要求1所述的船用5Ni钢埋弧焊接方法,其特征在于:所述拼接材料的厚度为40mm~50mm。
3.根据权利要求1所述的船用5Ni钢埋弧焊接方法,其特征在于:所述K型坡口的坡口角度为45°,钝边为5mm。
4.根据权利要求1所述的船用5Ni钢埋弧焊接方法,其特征在于:所述焊丝的化学组分及质量百分比为,C:≤0.03%,Si:0.10~0.40%,Mn:0.2~1.0%,P:≤0.020%,S:≤0.030%,Cr:14~18%,Ni:53~60%,W:3.0~4.5%,Fe:4.0~7.0%,Mo:15.0~17.0%,余量为不可避免的杂质元素。
5.根据权利要求4所述的船用5Ni钢埋弧焊接方法,其特征在于:两拼接母材的焊接接头经试验焊缝超声波探伤结果达到GB/T 11345-1989标准规定的要求I级要求。
6.根据权利要求4所述的船用5Ni钢埋弧焊接方法,其特征在于:两拼接母材的焊接接头的抗拉强度介于620~660MPa,弯心直径D=4a,180℃正反冷弯合格,-130℃极低温横向冲击韧性值稳定:焊缝处的横向冲击韧性值≥70J、熔合线的横向冲击韧性值≥60J、HAZ的横向冲击韧性值≥100J、母材的横向冲击韧性值≥180J,满足船级社可焊性认证及生产要求。
7.根据权利要求4所述的船用5Ni钢埋弧焊接方法,其特征在于:两拼接母材的焊接接头的焊缝区组织为奥氏体组织,热影响区组织为下贝氏体组织,其中,下贝氏体组织片层细小,由此具备良好的极低温韧性。
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CA3189684A CA3189684A1 (en) | 2020-08-18 | 2021-05-30 | A submerged arc welding method of 5ni steel for shipbuilding |
EP21857276.6A EP4180164A4 (en) | 2020-08-18 | 2021-05-30 | 5NI SHIPBUILDING STEEL POWDER SUBSUB ARC WELDING PROCESS |
PCT/CN2021/097059 WO2022037175A1 (zh) | 2020-08-18 | 2021-05-30 | 一种船用5Ni钢埋弧焊接方法 |
JP2023512130A JP7482319B2 (ja) | 2020-08-18 | 2021-05-30 | 船用5Ni鋼サブマージアーク溶接方法 |
KR1020237009105A KR20230048558A (ko) | 2020-08-18 | 2021-05-30 | 선박용 5Ni 강 서브머지드 아크 용접 방법 |
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CN112192001B (zh) * | 2020-08-18 | 2022-05-06 | 江阴兴澄特种钢铁有限公司 | 一种船用5Ni钢埋弧焊接方法 |
CN114833531B (zh) * | 2022-04-18 | 2024-04-05 | 广州市洲航船舶设备有限公司 | 一种低温高锰钢t型接头的焊接方法 |
CN115178839B (zh) * | 2022-07-14 | 2024-03-19 | 攀钢集团攀枝花钢铁研究院有限公司 | 一种提高QStE钢板焊接接头弯曲性能的方法 |
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WO2022037175A1 (zh) | 2022-02-24 |
CA3189684A1 (en) | 2022-02-24 |
JP2023539123A (ja) | 2023-09-13 |
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